Although he did not submit any music until August 2009, Kirbyfemur has quickly become a major contributor to Newgrounds's Audio Portal. He has created and is judging the Ng2011 Time Sig Competition, which asks competitors to stretch themselves by submitting entries which use unusual time signatures, or switch the time signature during the piece. As of late May 2011, he has 116 audio submissions in a wide variety of genres, including Classical, House, and Video Game.